Safety device for elevators



June 24, 1930. F. L. MOORE 1,765,690

SAFETY DEVICE FOR ELEvAToRs Filed Jan. 25. 1929 2 Sheets-Sheet l gnuenozTWH/ 1700]? 333131116 lima/1j l www June 24, 1930. F. MOORE 1,765,690

SAFETY DEVICE FOR ELEvAToRs Filed Jan. 25, 1929 2 Sheets-Sheet 2 nmz/fz. am 335131115, Sfr/kommt Patented June 24, 1930 UNITED s'ra'rssv FRANKL. MOORE, F CHATHAM, NEW JERSEY SAFETY DEVICE FOR ELEVA'I'ORSApplication led January 25, 1929. Serial No. 334,899.

This invention relates to improvements Vin safety devices for elevators,and more particularly to a device or mechanism wh-ich will be placed atevery floor in an elevator shaft to cooperate with spaced cams on theelevator car to positively prevent the operation of the car when thedoor in the shaft is open. Y

Among the principal objects of my invention are asfollows: Toprevent-the accidental or intentional operation of an elevator car whilethe door to the shaft is open at the floor where the car is stopped; topositively and automatically close any door accidentally l'eft open inthe shaft, as the carmoves up or down the shaft; and .to providefanimproved safety device for selfoperated elevators which will swing outinto the path of movement of the elevator car to support its weightshould the cables break or the car slip. Other objects will appear asthe description proceeds.

Drawings Figure 1 is afront elevation of a portion of anelevator shaftand door therefor equipped with my improved device;

Figure 2 is a side elevation of my safety apparatus showing the elevatorshaft, door and car in section;

Figure 3 is a plan View of my safety apparatus showing the elevatorshaft, door and car in section;

Figure 4 is a perspective view of my improved safety apparatus;

VFigure 5 is a front elevation of the apparatus;

Figure 6 is a plan View showing the cam in engagement with the face ofthe safety rudder and showing various positions of the rudder in dottedlines.

Description L opening in an elevatorshaft, and extending transversely ofthe opening. Each bar l is formed with the spaced stop shoulders 3 atone end thereof, arranged at the opposite sides of one of the brackets 2and serves against the wall of the shaft by a linkage connection withthe sliding bar 1 when vthe car door is respectively'opened and closed.The connection between the plate 4 and the rod 1 includes a pin 8carried on a laterally extending arm 9 on the yplate 4 which is yloosely received in the slot 10 between thel spaced ears 11 formedadjacent the end-*of the rod 1 opposite the shoulders 3. f

Intermediate the ends of the rod 1 is a cam plate 12 pivoted at 13 tothe said rod 1, and has its outer end taperedk and extending throughaslot 14 in the fixed arm or bracket 15. A shoulder 16 is also formed onthe lower side of the plate 12 intermediate its ends and is adapted toengage an operatf ing pin 17 carried by the bracket -18 on the door 19to the shaft 6, while av second shoulthe other side of the said pin. yIfitis deder 20 on the lower side of the bar 1 engages sired to use therod 41, without the cam p plate 12, a vshoulder 21 spaced from theshoulder 20 will be employed so that when the pin is engaged by eithershoulder, the rod 1 will be shifted from side to lside. f

Canrbrackets 28 and 24 are secured respec-l f tively to the upper andlower sidev edges of the car 7 and are adapted to contact withktherudder plate 4 if the same is extended4 out into the elevator shaft, toforce the said plate inwardly parallel with the wall Vof the shaft. Eachbracket is also provided with' an auxiliary cam surface 25 which engagesthe plate after the main cam surface has started to swing the plate,thereby positively forcing the plate Yinto retracted position.

From the foregoing description, the mode of operation will be understoodtobe as follows: Assuming that the elevator vcar is on the level ofafioor and the shaft door is closed, the several parts will assume therelative position shown in Fig. l of the drawings. As the door is drawnopen, the pin 17 carried by the door, will be released from the shoulder16 as the plate raises on its cam surface, thereby permitting the doorto open fully. If a door below or above the car is opened and left open,the rudder at that floor will be extended into the shaft so that whenthe car descends or ascends, the cam at the' bottom or top of the carwill engage the rudder and swing it into parallel relation with thewall, thereby removing the same from the path of the elevator car.

During the period when the elevator door is open, the rudder 4 is swungoutward between the brackets 26S-26, thereby locking the elevator in thereceiving position.

v As the door is closed, the rudder 4 is moved out of engagement withthe said brackets permitting the car to descend or ascend.

It will be understood that many minor changes in detail of constructionmay be resorted to without departure from the spirit of the invention.

Claims: j

l. An elevator safety `device in combination with an elevator car andshaft therefor having a plurality of door openings, an operating barmounted transversely of a door opening, a rudder plate mounted to beswung into said shaft and operatively connected with said bar, a camplate carried by said bar, and means carried by the car for operativelyengaging said rudder plate.

2. An elevator safety device in combination with an elevator car andshaft therefor having a plurality of door openings, a rudder platemounted at the side of each door opening in said shaft, means on eachdoor operatively connected to said rudder plates to cause the same toswing out into the shaft when a door is opened, and plural cams arrangedat an angle to each other arranged at the top and bottom of said car forengaging an outwardly directed rudder plate as the car ascends ordescends to force the plate out of the path of the car and against thewall of the shaft.

3. An elevator safety device in combination with an elevator car andshaft having a plurality of door openings, including an operating barmounted transversely of each door opening, means for limiting thetransverse movement of said bar, a rudder plate mountedat the side ofeach door opening and being operatively connected with said bar, aslotted bracket adjacent each of said bars, a cam plate pivotallysupported on each bar adapted to extend through said slotted brackets,and shoulders formed on said bars and cam plates adapted to cooperatewith means carried by the doors in the Vand being operatively connectedwith said bar, a slotted bracket adjacent each of said bars, a cam platepivotally supported on each bar adapted to extend through said slottedbrackets, shoulders formed on said bars and cam plates adapted tocooperate with means carried by the doors in the shaft topositivelycause the rudder plates to@ swing out into the shaft when a door isopened, and means on the elevator car for engaging a rudder plateextending into the shaft as the car ascends or descends to force thesame out of the path of the car and against the wall of the shaft.

5. An elevator safety device in combination withk an elevator car andshaft having a plurality of door openings, including an operating barmounted transversely of each door` opening, means for limiting thetransverse movement of said bar, a rudder plate mounted at the side ofeach door opening and being operatively connected with said` bar, aslotted bracket adjacent each of said bars, a cam plate pivotallysupported on each bar adapted to extend through said slotted brackets,and cams mounted at the top and bottom of said car for engaging therudder plate as the car ascends or descends to force the plate out `ofthe path of the car and against the wall of the shaft.

6. An elevator safety device in combination with an elevator car andshaft 'having a plurality of door openings, including an operating barmounted transversely of each door opening, means for limiting thetransverse movement of said'bar, a rudder plate mounted at the side ofeach door opening and being operatively connected with said bar, aslotted bracket adjacent each of said bars, a cam plate pivotallysupported on each barradapted to extend through said` slotted brackets,and plural angularly arranged cams at the top and bottom of said car forengaging the rudder platevas the car ascends or descends to force therudder plate out of the path of a passing car and against the wall ofthe shaft. y

7. An elevator safety device in combination with an elevator car andshaft having a plurality of door openings, including' an operating barmounted transversely ofeach door opening, means for limiting thetransverse movement of said bar, a rudder plate mounted at the side ofeach door opening and being operatively connected with said shaft topositively cause the rudder plates to bar, a slotted bracket adjacenteach of said bars, a cam plate pivotally supported on each bar adaptedto extend through said slotted brackets, shoulders formed on said barsand cam plates adapted to cooperate With means carried by the doors inthe shaft to positively cause the rudder plates to swing out into theshaft when a door is opened, and spaced ledges carried by the elevatoradapted to bracket said rudder plate between the same for locking theele- Vator in fixed position While the door stands open.

FRANK L. MOORE.

